Documentation/devicetree/bindings/sound/atmel-classd.txt

   1 * Atmel ClassD driver under ALSA SoC architecture
   2
   3 Required properties:
   4 - compatible
   5         Should be "atmel,sama5d2-classd".
   6 - reg
   7         Should contain ClassD registers location and length.
   8 - interrupts
   9         Should contain the IRQ line for the ClassD.
  10 - dmas
  11         One DMA specifiers as described in atmel-dma.txt and dma.txt files.
  12 - dma-names
  13         Must be "tx".
  14 - clock-names
  15         Tuple listing input clock names.
  16         Required elements: "pclk", "gclk" and "aclk".
  17 - clocks
  18         Please refer to clock-bindings.txt.
  19
  20 Optional properties:
  21 - pinctrl-names, pinctrl-0
  22         Please refer to pinctrl-bindings.txt.
  23 - atmel,model
  24         The user-visible name of this sound complex.
  25         The default value is "CLASSD".
  26 - atmel,pwm-type
  27         PWM modulation type, "single" or "diff".
  28         The default value is "single".
  29 - atmel,non-overlap-time
  30         Set non-overlapping time, the unit is nanosecond(ns).
  31         There are four values,
  32         <5>, <10>, <15>, <20>, the default value is <10>.
  33         Non-overlapping will be disabled if not specified.
  34
  35 Example:
  36 classd: classd@fc048000 {
  37                 compatible = "atmel,sama5d2-classd";
  38                 reg = <0xfc048000 0x100>;
  39                 interrupts = <59 IRQ_TYPE_LEVEL_HIGH 7>;
  40                 dmas = <&dma0
  41                         (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
  42                         | AT91_XDMAC_DT_PERID(47))>;
  43                 dma-names = "tx";
  44                 clocks = <&classd_clk>, <&classd_gclk>, <&audio_pll_pmc>;
  45                 clock-names = "pclk", "gclk", "aclk";
  46
  47                 pinctrl-names = "default";
  48                 pinctrl-0 = <&pinctrl_classd_default>;
  49                 atmel,model = "classd @ SAMA5D2-Xplained";
  50                 atmel,pwm-type = "diff";
  51                 atmel,non-overlap-time = <10>;
  52 };